Kinetic-Molecular Theory To explain the existence of states of matter and changes of phase, we use a microscopic model of matter. The kinetic theory of matter states that the matter is made up of tiny particles that move all the time. ï· All matter is made up of tiny, invisible, moving particles.
A eukaryote (/juËËkÃ¦ri.oÊt/ or /juËËkÃ¦riÉt/) is any organism whose cells have a cell nucleus and other organelles enclosed within membranes. Eukaryotes belong to the taxon Eukarya or Eukaryota.
518 Chapter 18 â¢ Bacteria and Viruses Prokaryote Structure Prokaryotes are microscopic, unicellular organisms. They have some characteristics of all cells, such as DNA and ribosomes, but they lack a nuclear membrane and other membrane-bound organelles, such as mitochondria an d chloroplasts.